Yet despite efforts by Volkswagen, Audi, Mercedes-Benz and BMW to sell American consumers on those same attributes, diesels still account for only about 3 percent of U.S. car sales, about the same as hybrids.

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This narrow definition of trading account, with a focus on intent to sell the assets in the next 60 days, would allow JP Morgan to argue that the chief investment office portfolio, classified as held for sale, was not a trading account.

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Mr Castro said if remaining limitations on licences to sell food to Cuba were lifted, US trade could eventually account for more than half the island's food supply, said Mr Summer.

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But every time you sell, whether you buy another fund or not, put 5% into an account for your spouse to blow on whatever.

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